[En] The file "Fantasma_Rojo (Red Ghost).pdf" is in the previous step, it contains the outline of the electronic circuit, print it and then cut the transparent material using what you printed as a template.

With a marker you can draw on printing where the tracks go, for it you can use a black and red marker, to differentiate positive (+) and negative (-) as I've done.

Once we have the outline in the transparent material we proceed to bend as shown in the image.

NOTE: I used a transparent material but you can also use a piece of cloth, the idea is whatever you use must be flexible.